CoverFlow had a nice option to only display albums of a user-defined minimum length. This kept stray tracks from cluttering your album browsing. Unfortunately, iTunes 7 did not include this feature in its implementation of CoverFlow, but you can achieve the same functionality with this smart playlist:

Track Number -- is not -- 0

I named this @LBUM BROWSE to keep it at the top of my playlists. You will, of course, have to strip track numbers from your stray tracks to make this work. For me, it was a small price to pay considering these tracks were already on their own.

That solution would certainly work, although I chose not to do that because I feel it "penalizes" the music I care about (I don't want to mislabel an album as a compilation unless it really is a compilation) while benefitting the stray music (by giving it the dignity of a track number).